5 * More than enough for everybody ;) The huge number of majors
6 * is a leftover from 16bit dev_t days, we don't really need that
12 * Time out in seconds for disks and Magneto-opticals (which are slower).
14 #define SD_TIMEOUT (30 * HZ)
15 #define SD_MOD_TIMEOUT (75 * HZ)
17 * Flush timeout is a multiplier over the standard device timeout which is
18 * user modifiable via sysfs but initially set to SD_TIMEOUT
20 #define SD_FLUSH_TIMEOUT_MULTIPLIER 2
21 #define SD_WRITE_SAME_TIMEOUT (120 * HZ)
24 * Number of allowed retries
26 #define SD_MAX_RETRIES 5
27 #define SD_PASSTHROUGH_RETRIES 1
28 #define SD_MAX_MEDIUM_TIMEOUTS 2
31 * Size of the initial data buffer for mode and read capacity data
33 #define SD_BUF_SIZE 512
36 * Number of sectors at the end of the device to avoid multi-sector
37 * accesses to in the case of last_sector_bug
39 #define SD_LAST_BUGGY_SECTORS 8
42 SD_EXT_CDB_SIZE
= 32, /* Extended CDB size */
43 SD_MEMPOOL_SIZE
= 2, /* CDB pool size */
47 SD_DEF_XFER_BLOCKS
= 0xffff,
48 SD_MAX_XFER_BLOCKS
= 0xffffffff,
49 SD_MAX_WS10_BLOCKS
= 0xffff,
50 SD_MAX_WS16_BLOCKS
= 0x7fffff,
54 SD_LBP_FULL
= 0, /* Full logical block provisioning */
55 SD_LBP_UNMAP
, /* Use UNMAP command */
56 SD_LBP_WS16
, /* Use WRITE SAME(16) with UNMAP bit */
57 SD_LBP_WS10
, /* Use WRITE SAME(10) with UNMAP bit */
58 SD_LBP_ZERO
, /* Use WRITE SAME(10) with zero payload */
59 SD_LBP_DISABLE
, /* Discard disabled due to failed cmd */
63 SD_ZERO_WRITE
= 0, /* Use WRITE(10/16) command */
64 SD_ZERO_WS
, /* Use WRITE SAME(10/16) command */
65 SD_ZERO_WS16_UNMAP
, /* Use WRITE SAME(16) with UNMAP */
66 SD_ZERO_WS10_UNMAP
, /* Use WRITE SAME(10) with UNMAP */
70 struct scsi_driver
*driver
; /* always &sd_template */
71 struct scsi_device
*device
;
74 #ifdef CONFIG_BLK_DEV_ZONED
75 unsigned int nr_zones
;
76 unsigned int zone_blocks
;
77 unsigned int zone_shift
;
78 unsigned long *zones_wlock
;
79 unsigned int zones_optimal_open
;
80 unsigned int zones_optimal_nonseq
;
81 unsigned int zones_max_open
;
84 sector_t capacity
; /* size in logical blocks */
89 u32 unmap_granularity
;
92 unsigned int physical_block_size
;
93 unsigned int max_medium_access_timeouts
;
94 unsigned int medium_access_timed_out
;
97 u8 protection_type
;/* Data Integrity Field */
100 unsigned ATO
: 1; /* state of disk ATO bit */
101 unsigned cache_override
: 1; /* temp override of WCE,RCD */
102 unsigned WCE
: 1; /* state of disk WCE bit */
103 unsigned RCD
: 1; /* state of disk RCD bit, unused */
104 unsigned DPOFUA
: 1; /* state of disk DPOFUA bit */
105 unsigned first_scan
: 1;
110 unsigned lbpws10
: 1;
114 unsigned rc_basis
: 2;
117 unsigned ignore_medium_access_errors
: 1;
119 #define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev)
121 static inline struct scsi_disk
*scsi_disk(struct gendisk
*disk
)
123 return container_of(disk
->private_data
, struct scsi_disk
, driver
);
126 #define sd_printk(prefix, sdsk, fmt, a...) \
128 sdev_prefix_printk(prefix, (sdsk)->device, \
129 (sdsk)->disk->disk_name, fmt, ##a) : \
130 sdev_printk(prefix, (sdsk)->device, fmt, ##a)
132 #define sd_first_printk(prefix, sdsk, fmt, a...) \
134 if ((sdkp)->first_scan) \
135 sd_printk(prefix, sdsk, fmt, ##a); \
138 static inline int scsi_medium_access_command(struct scsi_cmnd
*scmd
)
140 switch (scmd
->cmnd
[0]) {
145 case SYNCHRONIZE_CACHE
:
157 case VARIABLE_LENGTH_CMD
:
158 switch (scmd
->cmnd
[9]) {
170 static inline sector_t
logical_to_sectors(struct scsi_device
*sdev
, sector_t blocks
)
172 return blocks
<< (ilog2(sdev
->sector_size
) - 9);
175 static inline unsigned int logical_to_bytes(struct scsi_device
*sdev
, sector_t blocks
)
177 return blocks
* sdev
->sector_size
;
180 static inline sector_t
bytes_to_logical(struct scsi_device
*sdev
, unsigned int bytes
)
182 return bytes
>> ilog2(sdev
->sector_size
);
185 static inline sector_t
sectors_to_logical(struct scsi_device
*sdev
, sector_t sector
)
187 return sector
>> (ilog2(sdev
->sector_size
) - 9);
191 * Look up the DIX operation based on whether the command is read or
192 * write and whether dix and dif are enabled.
194 static inline unsigned int sd_prot_op(bool write
, bool dix
, bool dif
)
196 /* Lookup table: bit 2 (write), bit 1 (dix), bit 0 (dif) */
197 const unsigned int ops
[] = { /* wrt dix dif */
198 SCSI_PROT_NORMAL
, /* 0 0 0 */
199 SCSI_PROT_READ_STRIP
, /* 0 0 1 */
200 SCSI_PROT_READ_INSERT
, /* 0 1 0 */
201 SCSI_PROT_READ_PASS
, /* 0 1 1 */
202 SCSI_PROT_NORMAL
, /* 1 0 0 */
203 SCSI_PROT_WRITE_INSERT
, /* 1 0 1 */
204 SCSI_PROT_WRITE_STRIP
, /* 1 1 0 */
205 SCSI_PROT_WRITE_PASS
, /* 1 1 1 */
208 return ops
[write
<< 2 | dix
<< 1 | dif
];
212 * Returns a mask of the protection flags that are valid for a given DIX
215 static inline unsigned int sd_prot_flag_mask(unsigned int prot_op
)
217 const unsigned int flag_mask
[] = {
218 [SCSI_PROT_NORMAL
] = 0,
220 [SCSI_PROT_READ_STRIP
] = SCSI_PROT_TRANSFER_PI
|
221 SCSI_PROT_GUARD_CHECK
|
222 SCSI_PROT_REF_CHECK
|
223 SCSI_PROT_REF_INCREMENT
,
225 [SCSI_PROT_READ_INSERT
] = SCSI_PROT_REF_INCREMENT
|
226 SCSI_PROT_IP_CHECKSUM
,
228 [SCSI_PROT_READ_PASS
] = SCSI_PROT_TRANSFER_PI
|
229 SCSI_PROT_GUARD_CHECK
|
230 SCSI_PROT_REF_CHECK
|
231 SCSI_PROT_REF_INCREMENT
|
232 SCSI_PROT_IP_CHECKSUM
,
234 [SCSI_PROT_WRITE_INSERT
] = SCSI_PROT_TRANSFER_PI
|
235 SCSI_PROT_REF_INCREMENT
,
237 [SCSI_PROT_WRITE_STRIP
] = SCSI_PROT_GUARD_CHECK
|
238 SCSI_PROT_REF_CHECK
|
239 SCSI_PROT_REF_INCREMENT
|
240 SCSI_PROT_IP_CHECKSUM
,
242 [SCSI_PROT_WRITE_PASS
] = SCSI_PROT_TRANSFER_PI
|
243 SCSI_PROT_GUARD_CHECK
|
244 SCSI_PROT_REF_CHECK
|
245 SCSI_PROT_REF_INCREMENT
|
246 SCSI_PROT_IP_CHECKSUM
,
249 return flag_mask
[prot_op
];
252 #ifdef CONFIG_BLK_DEV_INTEGRITY
254 extern void sd_dif_config_host(struct scsi_disk
*);
255 extern void sd_dif_prepare(struct scsi_cmnd
*scmd
);
256 extern void sd_dif_complete(struct scsi_cmnd
*, unsigned int);
258 #else /* CONFIG_BLK_DEV_INTEGRITY */
260 static inline void sd_dif_config_host(struct scsi_disk
*disk
)
263 static inline int sd_dif_prepare(struct scsi_cmnd
*scmd
)
267 static inline void sd_dif_complete(struct scsi_cmnd
*cmd
, unsigned int a
)
271 #endif /* CONFIG_BLK_DEV_INTEGRITY */
273 static inline int sd_is_zoned(struct scsi_disk
*sdkp
)
275 return sdkp
->zoned
== 1 || sdkp
->device
->type
== TYPE_ZBC
;
278 #ifdef CONFIG_BLK_DEV_ZONED
280 extern int sd_zbc_read_zones(struct scsi_disk
*sdkp
, unsigned char *buffer
);
281 extern void sd_zbc_remove(struct scsi_disk
*sdkp
);
282 extern void sd_zbc_print_zones(struct scsi_disk
*sdkp
);
283 extern int sd_zbc_write_lock_zone(struct scsi_cmnd
*cmd
);
284 extern void sd_zbc_write_unlock_zone(struct scsi_cmnd
*cmd
);
285 extern int sd_zbc_setup_report_cmnd(struct scsi_cmnd
*cmd
);
286 extern int sd_zbc_setup_reset_cmnd(struct scsi_cmnd
*cmd
);
287 extern void sd_zbc_complete(struct scsi_cmnd
*cmd
, unsigned int good_bytes
,
288 struct scsi_sense_hdr
*sshdr
);
290 #else /* CONFIG_BLK_DEV_ZONED */
292 static inline int sd_zbc_read_zones(struct scsi_disk
*sdkp
,
298 static inline void sd_zbc_remove(struct scsi_disk
*sdkp
) {}
300 static inline void sd_zbc_print_zones(struct scsi_disk
*sdkp
) {}
302 static inline int sd_zbc_write_lock_zone(struct scsi_cmnd
*cmd
)
304 /* Let the drive fail requests */
308 static inline void sd_zbc_write_unlock_zone(struct scsi_cmnd
*cmd
) {}
310 static inline int sd_zbc_setup_report_cmnd(struct scsi_cmnd
*cmd
)
312 return BLKPREP_INVALID
;
315 static inline int sd_zbc_setup_reset_cmnd(struct scsi_cmnd
*cmd
)
317 return BLKPREP_INVALID
;
320 static inline void sd_zbc_complete(struct scsi_cmnd
*cmd
,
321 unsigned int good_bytes
,
322 struct scsi_sense_hdr
*sshdr
) {}
324 #endif /* CONFIG_BLK_DEV_ZONED */
326 #endif /* _SCSI_DISK_H */